Replying to Phone problem...+k for help

So I recently smashed my phone (HTC Incredible 2), and I've been having problems with calls. Normally, when you put your phone to your face when your talking on the phone, the screen shuts off, and when you take it away from your face, the screen turns on. My phone thinks that it's constantly on my face, so it the screen is always off until the other person hangs up or I take out the battery and restart it. Is there any way this can be fixed in the settings or something to have the screen constantly on when I'm making calls. Thanks